Docker Foundation

changhao 2021-01-21 11:09:35
docker foundation

edition 1.0
The team Beixin Zhonghe Technology Group
Make <>
Time 2021/01/21

Knowledge point

  • docker Basic concepts

    • docker Add, delete, change and check images
    • docker Containers
    • docker Add, delete, modify and check the container
    • docker Other commands use
    • docker Import / export
    • docker Mirror market
    • docker Alibaba cloud image acceleration
  • install docker
  • docker experiment

    • test
    • Customize docker Mirror image

      • Case a
      • Case 2

docker Basic concepts

  • Mirror image : image
  • Containers : container
  • Warehouse : repository

docker Add, delete, change and check images

docker search # Mirror name : Go to docker hub Search for image files
docker pull # Mirror name : download docker Mirror image
docker images # Check out what's available locally docker Mirror image , Same as docker image ls
docker rmi # Mirror image id Or the image name : Delete local docker Mirror image
docker rmi -f # Mirror image id: Force deletion of image files 

docker Containers

  • docker The container must have processes running in the background , Otherwise the container will hang up
  • docker Mirror every run Will generate new containers id Record

docker Adding, deleting, modifying and checking containers

docker run Mirror name / Mirror image id: Runtime container process instance
docker ps: View the running container process
docker ps -a: Show all running container processes ( Running , And the container processes that hang up ), Same as docker container ls -a, Old orders
docker run -it Mirror image id/ Mirror name /bin/bash: Run an interactive container
Parameters :-i:interactive, Interactive command operation ;-t:terminate, Open a terminal interface ;/bin/bash: Appoint linux Interpreter
docker rm Containers id: Delete container id Record , Only dropped containers can be deleted
docker rm `docker ps -aq` : Batch delete the container records that stop running
docker exec -it Running container id /bin/bash: Into a running container
docker logs Containers id: View the container's log
docker logs -f Containers id: Check the logs in the container
# Start the container ( The background model )
docker run -d ubuntu:15.10 /bin/sh -c "while true; do echo hello world; sleep 1; done"
# -P Parameters : Randomly map the network ports used inside the container to the host
docker run -P mongo
docker ps # Look at randomly mapped ports
# -p Parameters : Set fixed mapping port
docker -run -d -p 27017:27017 xxx_id /bin/bash
# --net host Parameters : Can be used through web Interface access to container
docker run --net host xxx_id /bin/bash

docker Other commands use

# docker View configuration information
docker info
# return docker Object information , The underlying information , Return to one JSON The document records Docker Container configuration and status information
docker inspect xxx_id

docker Import / export

# Export a mirror
docker export 1e560fca3906 > center.tar
# Import mirror
docker import cneter.tar
# Export local image
docker save -o docker-mongo.tar 213c2b6cee9f
# Import local image
docker load -i docker-mongo.tar

docker Mirror market

# DaoCloud manufacturer

docker Alibaba cloud image acceleration

# Alibaba cloud image acceleration address

install docker

wget -O /etc/yum.repos.d/epel.repo
yum install -y docker
# Configure image Download Accelerator
curl -sSL | sh -s
cat /etc/docker/daemon.json
{"registry-mirrors": [""]}

docker experiment


docker run -d centos /bin/sh -c "while true;do echo 'hello, beixin team.'; sleep 1;done"
-d:daemonize, Background operation
centos: Specify which mirror
/bin/sh: Appoint linux Interpreter
-c: Specify a paragraph shell Code
"while true;do echo ' Xiong Da is great '; sleep 1;done", One per second

Customize docker Mirror image

Case a

# Get one centos Mirror image , Run the container instance
docker run -it centos /bin/bash
# Into the container space , install vim
yum install vim -y
# Exit the container , Submit this container as a new image
docker ps -a # Check that you just installed vim The container of id, here
4595c3de8418 9f3 # Here, when I find out 459
# Submit image syntax :docker commit Containers id New image name
docker commit 459 centos-vim
# View the submitted image file
docker images
# Export the image file to the specified file , Note that for compressed files
docker save centos-vim > /opt/centos-vim.tar.gz
# Test importing this image locally , You can delete the image we generated first
docker rmi centos-vim
# Import mirror
docker load < /opt/centos-vim.tar.gz
# Imported image , Change the name
# docker tag Old image name With docker Warehouse id start / New image name
docker tag 84d mydocker/centos-vim
# perform docker Mirror image , Run out of the container , Check to see if you have vim
docker run -it mydocker/centos-vim
vim # If you succeed ,vim It can be executed

Case 2

docker Run one flask The script for the framework

# download training/webapp Mirror image , Used to run python Of flask project .
# docker run Characteristics , If the mirror doesn't exist , Then go to docker pull download
# adopt training/webapp Instance a container object
docker run -d -P training/webapp python
# Look at the port where the container is running
docker port Containers id
# Start stop command of the container
docker start Containers id
docker stop Containers id
# According to the port mapping , see flask frame
visit :

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